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Crystal vibration plate use and maintenance
Release time:
2018-11-16
Source:
Xinhua
Whether the crystal vibrator should be changed depends on the following aspects:
1.ACT size, generally based on greater than 400 ﹔
2.Life size, divided into increase and decrease and related to the plated products, whether the service life has reached, the general service life from about 99% to 90-92% should be changed;
3. If the Rate DEV is greater than about 10%, it should be changed. If the evaporation rate is obviously abnormal, it should also be changed at this time;
4. Surface quality, the surface of the crystal vibration plate is obviously film shedding or peeling phenomenon should also be replaced.
5. The sensitivity of the crystal oscillator decreases with the increase of the quality, so that when the quartz crystal monitoring method (crystal control method) is used for coating control, the coating curve changes to the long wave with the decrease of Life of the crystal oscillator.
Crystal vibration plate use and maintenance